Relieving attachment for lathes and the like



W. H. RUNGE.

RELIEVING ATTACHMENT Foa LATHEs AND THE LIKE.

K APPLICATION FILED MAR. 3. I9I9.

3 SHEETS-SHEET I.`

Patented May 11, 1920.

/N VE/V 70A.

A TTO/PNEY.

W. H. RUNGE.

RELIEVNG ATTACHMENT FOR LATHES AND THE LIKE.

APPLICATIGN FILED MAR. 3.1919.

Patented MayA 11, 1920'.

3 SHEETS-SHEET 2.

MIM E Tim/1"@ jf W. H. RUNGE. RELIEVTNG ATTACHMENT FoR LATHES AND THE LIKE.

I APPLICATION FILED MAR. 3. 1919. 1,339,983, Patented May 11,

3 SHEETS-SHEET E36. f1@ KWG cf. L

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UNrrED srnrns PATENT orricn.

WILLIAM H. RUNGE, 0F SENECA FALLS, NEVI YORK, ASSIGNOR T0 THE SENECA'FALLS MANUFACTURING CO., INC., OF SENECA FALLS, NEW YORK.

RELIEVING ATTACHMENT FOR LATI-IES AND THE LIKE.

Application led. March 3, 1919.

To all whom it may concern.'

Be it known that I, VILLIAM H. RUNGE, a citizen of the United States, residing at Seneca Falls, in the county of Seneca and State of New York, have invented -a new and useful Improvement in Relieving Attachments for Lathes and the like, of which the following is a specification.

T his invention relates to relieving attachments for lathes or analogous machines, and more particularly to attachments 0f this kind in which the extent of the backing off movement may be varied.

'l he objects of the invention are to provide an attachment of this kind of improved and simplified construction; also to provide a mechanism of this kind in which adjustments for varying the backing olf movement can be readily effected; also to provide a mechanism of this kind in which the relieving attachment may be readily rendered inoperative so that the lathe may be used in the usual manner; also to provide means of improved construction for placing` the tool in different angular positions relatively to the work; also to improve the construction of apparatus of this kind in other respects hereinafter specified.

In the accompanying drawings:

Figure l is a top plan view of a relieving attachment embodying the invention.

Fig. 2 is an end elevation thereof.

Fig. 3 is a fragmentary sectional elevation thereof on line 3--3, Fig. 1.

Fig. 4 is a fragmentary sectional elevation thereof also on line 3 3, Fig. l, showino' some of the parts in different positions.

Fig. 5 is a side elevation thereof, partly in section.

Fig. 6 is a longitudinal sectional elevation thereof on line 6-6, Fig. 1.

Fig. 7 is a view showing some of the movable members of the relieving attachment removed from the housing.

Figs. 8 and 9 are transverse sectional elevations thereof on lines 8 8 and' 9--9, respectively, Fig. 6.

A represents the usual tool carriage movable lengthwise of the lathe in any suitable manner and having a carriage cross slide A slidable transversely thereon. A2 represents a tool slide base which is adapted to be secured in various angular positions with regard to the carriage cross slide A', and A3 represents a tool slide which is movablev Specification of Letters Patent.

Patented May 11, 1920.

Serial No. 280,323.

relatively to the tool slide base. The tool slide A3 includes the usual post or holder B for the tool b and may be of any usual or suitable construction. The tool slide A3 has a limited movement relatively to the tool slide base A2, depending upon the amount of backing off or relieving to be effected by the tool, the tool slide being guided in its movements by the usual slot in the tool slide base, in which a part a of the tool slide engages. The tool slide is drawn away from the work by means of a spring a or other suitable means, the tension of the spring being preferably adj usted by means of a threaded bolt a2 or the like. All of these parts may be of any usual or suitable construction and of themselves constitute no part of this invention.

The movement of the tool toward the work against the action of the spring a for the purpose of backing off or relieving the -teeth of cutters or the like may be effected by any suitable means, a rotary shaft C being preferably employed which is driven by means of suitable gearing (not shown) at the head end of the lathe, the shaft being driven at a definite ratio with regard to the work. The shaft C is suitably connected to a cam shaft C which is journaled in a housing member D secured to or formed inte ral with the tool slide base A2. rlhe shaft is provided with a cam E by means of which the backing od movement of the tool is effected and which may be of any suitable construction, the cam shown being provided with two cam faces so that one revolution of the cam shaft C causes two movements of the tool toward the work, the tool being withdrawn by means of the spring a. A cam of any other form may be employed if desired.

The cam E, in the construction shown, acts upon the tool slide A3 through the medium of a pin F, suitably secured on the tool slide A3 and extending into operative relation to the cam and through the medium of a. cam lever` G which is interposed between the cam and the pin F and by means of which the extent of movement imparted by the cam to the tool slide is varied. This lever is provided with a projecting portion g, Figs. 6 and 7, which engages the face of the cam. a body portion arranged beyond the end of the cam and provided with a slot or groove g in which the pin F of the tOOl slide engages, and a stud g2 projecting from the body portion of the lever G and entering a hole or bearing formed in an adjusting head, knob or member H, which is rotatably mounted in the end of the housing D. The adjusting head H is also provided with a post or pin It to which a spring Zt is attached, the other end of the spring being secured to the cam lever G at a distance from the stud g2 thereof and is adapted to hold the projection g of the cam lever in engagement with the face of the cani E. The rotation of the cam E causes the projecting portion g of the cam lever to move in accordance with the throw of the cam, and swings the lever G about the axis of the stud g2. In order to vary the movement of the tool slide A3, the adjusting head H is turned so as to move the stud g2 toward or from the pin F and thereby change the amount of movement imparted to the pin F by the cam lever. When the cam lever is in the position shown in Fig. 3, the pin F receives nearly its maximum movement, being in proximity to the outer end of the cam lever G, which end is subjected to the full throw of the cam. 1When the adjusting head H is turned so as to bring the stud g? of the cam lever G opposite to the pin F, no movement is imparted to the pin F since this portion of the cam lever is pivoted in vthe head H and therefore receives no movelmay be turned about its axis for the purpose .of placing the cam lever G in various positions norder to secure the head H in any desired position, the end of the housing D in which the head is arranged is preferablyI split, and a screwor the like vi is pro vided which clamps the head in any desired position relatively to the housing: D. The outer peripheryA of the' head H ispreferably graduated as shown at i3, the graduations correspondingto the movement imparted to the tool slide- A3 byy the cam and cam lever.

ABy means of the mechanism described, a compact and efficient relieving attachment is produced which is entirely inclosed in a housing or casing 4and which can be readily adjusted toeffect any desired movementl of the tool slide A3by merely turning the` adjusting head- H andV clamping the same in the*desired'position;l The relieving attachment has I the further advantage that. it can be instantly placed out of commission by setting the head H to the zero position, in which position the cam lever G is placedV as shown in Fig. at, and in which position n0 movement is transmitted to the slide A3.

In order to place the tool in any desired angular position relatively to the work, the following means are preferably employed.

The carriage cross slide A is provided with a post or pivot K journaled in the carriage cross slide and extending into a hole in the tool slide base A2, thus permitting the tool slide base to be turned about the post l relatively to the carriage cross slide A. Suitable means are preferably provided for locking the tool slide base A2 to the carriage ci'oss slide in such a way as to hold these two parts in any desired angular relation to each other. For this purpose the post or pivot l is provided with a hole Zr through which a pin L extends which has an eccentric portion Z arranged within the hole Ze of the pin or post. rlhe opposite ends of the pin are suitably journaled in the tool slide base A2 and the pin is provided at its outer end with a. head Zf by means of which the pin can be turned. llhe hole 7c of the post K is so placed relatively to holes in the tool slide base A2 that by turning the pin, the eccentric portion Z thereof presses against the upper wall of the hole to press the post l( upwardly, thereby drawing the tool slide base A2 and the carriage cross slide securely together, and preventing relative movement of these parts. rlhe eccentricity of the portion Z of the pin is preferably made small so that the pin locks itself. In this manner the tool slide base can be quickly locked or unlocked from the carriage cross slide and can be readily adjusted with regard to the same.

I claim as my invention:

1. In a relieving'meclianism, the combination with a movable tool-carrying member, a Cain for causingy said member to move relatively to the work, a lever interposed between said cam and said tool-carrying member, and means for adjusting the position of said lever about the axis of said cam to vary the movement imparted to ysai d tool-carrying member.

9,. ln a relieving mechanism, the combination with a movable tool-carrying memb r, a cam for imparting movement to said member, a lever engaging at one endon said cam and pivoted at the other end thereof, means for holding` said tool-carrying meinber in engagement with said lever, and means for moving said lever relatively to said tool-carrying member to vary the exm ranged in said housing beyond said lcam and having a part engaging said cam and a piv- )ted part, means for holding said tool-carrying member in engagement with said lever, and means also supported by said housing for changing the position ot said lever relativelyv to said tool-carrying meniber to vary the extent of movement of said member.

4c. ln a relieving mechanism, the combination with a movable tool-carrying member, a cam for imparting movement to said member, shaft for driving said cam and on the end of which said cam is mounted', a lever arranged beyond said cam and having a lateral extension engaging said camand a pivoted part, said lever being adapted to engage said tool-carrying member at a plurality of different portions of the lever, and means arranged beyond said lever and said cam for changing the position of said lever to vary the position of the lever With regard to said member to vary the extent oi movement thereof.

5. ln a relieving mechanism, the combination with a movable tool-carrying member, a cam for causing said member to move relatively7 to the Worlnalever interposed between said cam and said tool-carrying mem-- ber, means for adjusting the position of said lever relatively to said tool-carrying member to vary the extent or" movement imparted to said member and a graduated scale With which said adjusting means cooperate lor indicating the extent of movement imparted to said member.

6. In a relieving mechanism, the combination with a movable tool-carrying member, a cam for causing said member to move relatively to the Work, a lever interposed between said cam and said toolcarrying member and having a part engaging said cam and a pivoted part, and means for moving said lever relatively to said tool-carrying member and about the axis oli' said cam for varying the extent of movement or" said member.

7. In a relieving mechanism, the combination With a movable tool-carrying member, a cam for causing said member to move relatively to the Work, a lever interposed be,- tvveen said cam and said tool-carrying member and having a part engaging said cam, an adjustable member on which said lever is pivoted and which is provided vvith graduations for predetermining the relieving movement imparted to said tool-carrying member, and means for holding said adjustable member in various positions.

8. ln a relieving mechanism, the combination with a movable tool-carrying member, a caml for causing said member to move relatively to the Work, a lever interposed between said cam and said tool-carrying member and having a part engaging said cam, a

member adjustable substantially about the axis of said cam and on which said lever is pivoted, and means :tor holding said adjustable member in dili'erent positions to place said lever in dilerent positions relatively to said tool-carrying member' to vary the extent of movement thereof.

9. ln a relieving mechanism, the combination with a movable tool-carrying member, a cam for causing said member to move relatively to the Wo1k,alever interposed between said cam and said tool-carrying mem-- ber and having a part engaging said cam and a curved part on which said tool-carrying member engages, and an adjustable member pivotally mounted in proximity to said cam and on which said lever is pivoted, said adjustable member being movable about its axis to place said curved part ol said lever in different relations to said toolcarrying member to vary the extent of movement thereof.

l0. In a. relieving mechanism, the combination with a tool-carrying member, a rotary cam, a housing in which said cam is arranged, a lever engaging said cam and said tool-carrying member, and an adjustable member pivotally arranged in said housing and in Which said lever is pivoted, said adjustable member being adapted to place said lever in different positions relatively to said tool-carrying member to vary the extent of movement thereof.

l1. In a relieving mechanism, the combination with a tool-carrying member, a rotary cam, a housing in WhichA said cam is arranged and a lever engaging said cam and said tool-carrying member, an adjustable member pivotally arranged in said housing and in which' said lever is pivoted, said adjustable member being adapted .to place said lever in different positions relatively to said tool-carrying member to vary the extent of movement thereof, and means for locking said adjustable member in the position in which it is set.

12. In a relieving mechanism, the combination With a tool-carrying member, a rotary cam, a lever engaging said cam and said tool-carrying member, means for yieldingly holding said lever in engagement With said cam, and means for adjustingI said lever about the axis of said cam for varying the extent of movement of said toolcarrying member.

13. In a relieving mechanism, the combination with a tool-carrying member, a rotary cam. a driving shaft therefor on the end of Which said cam is arranged, an adjustable member arranged beyond said cam, and a lever arranged between said cam and said adjustable member and having a part projecting from one side of said lever and said cam and a pivot extending from the other side of said lever and journaled in said adjustable member, said adjustable member being adapted to move said lever intoA various positions relatively to said tool-carrying member to vary the extent of movement thereof.

l-l. In a relieving mechanism, the combination with a tool-carrying member, a rotary cam, a driving shaft therefor on the end of which said cam is arranged, an adjustable member arranged beyond said cam, and a lever having a body portion arranged between said cam and said adjustable member and having a part projecting from one side to engage said cam and a stud extending from the other side and pivoted on said adjustable member, said body portion being recessed and adapted to receive a part of said tool-carrying member, said adjustable member being adapted to move said lever into various positions relatively to said toolcarrying member to vary the extent of movement thereof.

l5. In a relieving mechanism, the combination with a movable tool-carrying member, a cam for imparting movement to said member, a housing for said cam, a shaft for driving said cam and which extends into one end of said housing, said cam being arranged on the end of said shaft, a lever arranged in said housing beyond said cam and having a part engaging said cam and a pivoted part, and means arranged in the other end of said housing and adjustable to change the position of said lever relatively to said tool-carrying member to vary the extent of movement of said member.

16. ln a relieving mechanism, the combination With a tool-carrying member, a rotary cam, a lever engaging said cam and said tool-carrying member, means for yieldingly holding said lever in engagement with said cam, and means for adjusting said lever to vary the extent of movement of said toolcarrying member, said lever being adapted to be placed in a position in Which no movement is imparted to said member.

17. In a relieving mechanism, the combination with a movable tool-carrying member, a cam for imparting movement to saidmember, a leverhaving a part engaging said cam and a pivoted part, said lever being adapted to engage said tool-carrying member at a plurality of dilerent portions or ythe lever7 and means for changing the position of said lever to vary the position of the lever with regard to said member to vary the extent of movement thereof, said lever being adapted to be placed in a position in which the pivot'ed part thereof is placed into operative relation to said tool-carrying member, whereby no movement is imparted to said tool-carrying member.

Witness my hand this 25th day of February, 1919.

vWILLIAM H. RUNGE. Witnesses:

M. N. JAooBY, E. W. FR-EELAND. 

